How would you describe a markup language in your own words?

#1

I’m curious how you guys would describe a markup language in your own words.

So far I’ve come up with "A computer language that uses text that a computer can understand to generate (something?)"
As you can see I am still a beginner but I’d appreciate to hear some responses and your guys definition of markup language.

#2

A language that is designed for the processing and presentation of text that specifies code for formatting of both the layout and style, within a text file.

(Adapted from webopedia)